Please help. I believe a is C$.$ correct me if wrong. Thank you

a$.$ Smith, Schroeder, and Torn$($SST$)$ is a$$ short$-$haul household furniture moving company.$$ SST$\text{'}$s labor$$ force, selected from the local community college football$$ team, is temporary and$$ part$-$time. SST is concerned with recent$$ complaints, as tabulated on the following tally$$ sheet:

a$1.$ Choose the correct Pareto chart below to identify the most serious moving problems.

b$.$ The manager of Smith, Schroeder, and Torn is attempting to understand the root causes of complaints. He has compiled the following list of issues that occurred during problem deliveries:

moving dolly has broken wheel, employee late to work.

Organize these causes into a cause$-$and$-$effect diagram. Complete the following diagram.

Match each number in the chart with corresponding cause.